This document presents a variety of materials for classroom use to address the issues of conflict, security, and peacemaking. Designed for high school, the lessons are presented from a personal perspective and intended for several learning environments, including: (1) integration into traditional courses; (2) self-contained one to two week units; (3) interdisciplinary units in the humanities; (4) a year's thematic focus; (5) a learning strategy approach; (6) a skill-centered approach; (7) schoolwide conflict resolution programs; and (8) conferences, schoolwide projects, and special events. The topics featured are: (1) "Introduction"; (2) "Security in Your Life" (8 activities); (3) "Dealing with Differences" (12 activities); (4) "Exploring the Nature of Conflict" (11 activities); (5) "Resolving Interpersonal Conflict" (11 activities); (6) "Dealing with Anger and Violence" (13 activities); (7) "Perspectives on War and Peacemaking" (14 activities); and (8) "Tools for Participation, Decision Making, and Problem Solving." Primary documents also are included, as are complete lesson plan procedures. (EH)